I also use MCAmap (if you meant that one) but I get the same problems as with CartographG in Bongatar and Desertopia I think. At least I remember it giving up trying to render some areas which is really frustrating when trying to render the entire map as finding the exact chunks takes a lot of time. Anyway good thing we have Dynmap so we don't have to bother with it really. I was mostly curious to see if the chunks were corrupted or something but I didn't find out for sure.